ModEntities-1.15.2

public static void setupEntitySpawns(Biome biome) {
        if (biome == ModBiomes.STRAWBERRY_FIELD.get()) {
            addEntitySpawn(biome, EntityClassification.CREATURE, new Biome.SpawnListEntry(ModEntities.STRAWBERRY_COW.get(), 12, 2, 4));
        }
        if (Config.COMMON.strawberryCowBiomes.get().contains(biome.getRegistryName().toString())) {
            addEntitySpawn(biome, EntityClassification.CREATURE, new Biome.SpawnListEntry(ModEntities.STRAWBERRY_COW.get(), 10, 2, 4));
        }
    }

    private static void addEntitySpawn(Biome biome, EntityClassification entityclassification, Biome.SpawnListEntry spawnlistentry) {
        biome.getSpawns(entityclassification).add(spawnlistentry);
    }